high-security
adjective /ˌhaɪ sɪˈkjʊərəti/
/ˌhaɪ sɪˈkjʊrəti/
[only before noun]- (of buildings and places
建筑或地方 戒备森严的；警戒严密的 - a high-security prison
警备森严的监狱
- a high-security prison
- (of prisoners
囚犯 关押在警备森严的监狱里的